Jonathan M. Prytherch

Jonathan is Of Counsel in Maynard Nexsen's Financial Services practice group. His practice focuses on regulatory defense, counseling, and investigations for securities broker-dealers and their registered representatives. 

Jonathan has over 20 years of securities regulatory experience, previously serving as a FINRA Enforcement attorney and in-house counsel at a large independent model securities broker-dealer. Prior to joining Maynard Nexsen, he also counseled broker-dealers through his work at a full-service regional law firm.

While at FINRA’s Department of Enforcement, Jonathan worked on matters across the broker-dealer regulatory spectrum, including sales-practice, supervision, record-keeping, operations and anti-money laundering. He also brought disciplinary actions against member firms and their associated persons through negotiated settlements, litigated proceedings before FINRA’s Office of Hearing Officers, and appeals before FINRA’s National Adjudicatory Council. Jonathan regularly guided FINRA staff on developing investigations and examinations concerning potential violations of the federal securities laws and FINRA rules.

Jonathan counsels clients on regulatory responses, investigative testimony defense, risk mitigation, and regulatory requirements for compliance controls and reviews. A thought leader in the industry, Jonathan regularly authors articles on FINRA initiatives.

Jonathan holds a J.D. from Brooklyn Law School.